A bag contains 10 red marbles, 10 white marbles, and 6 blue marbles. You draw 4 marbles out at random, without replacement. What is the probability that all the marbles are red? The probability that all the marbles are red is What is the probability that exactly two of the marbles are red? The probability that exactly two of the marbles are red is

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A: Given that  n=100, p=55%=0.55 , q=1-p=1-0.55=0.45 μ=np=100*0.55=55 σ=√npq=√(100*0.55*45)=4.9749  

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